Object level One or the Other validation

export default {
  name: "mediaObject",
  title: "My Media Object",
  type: "object",
  fields: [
    {
      name: "videoUrl",
      title: "Video url",
      type: "string",
      validation: (Rule) =>
        Rule.custom((videoUrl, {parent} : any) =>
          typeof parent.image === "undefined" && typeof videoUrl === "undefined"
            ? "Either Video url or Image must have a value"
            : true
        ),
    },
    {
      name: "image",
      title: "Image",
      type: "image",
      validation: (Rule) =>
        Rule.custom((image, {parent} : any) =>
          typeof parent.videoUrl === "undefined" && typeof image === "undefined"
            ? "Either Video url or Image must have a value"
            : true
        ),
    },
  ],
};